Subject: Re: [PATCH net v3] rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present

From: Hyunwoo Kim <[email-masked]>
Date: Mon, 11 May 2026 01:48:39 +0900

On Sun, May 10, 2026 at 08:45:20AM -0700, Jakub Kicinski wrote:
> On Fri, 8 May 2026 17:53:09 +0900 Hyunwoo Kim wrote:
> >  			    sp->hdr.securityIndex != 0 &&
> > -			    skb_cloned(skb)) {
> > +			    (skb_cloned(skb) ||
> > +			     skb_has_frag_list(skb) ||
> > +			     skb_has_shared_frag(skb))) {
> 
> We seem to be getting a lot of fixes for this issue, and this one is
> incorrect :| Writing to _any_ frags is incorrect. You have to copy
> if skb is not linear. skb_ensure_writable()

I was testing a patch based on skb_ensure_writable() but it seems v3
has just been merged to mainline...

What would be the best way to proceed?

Best regards,
Hyunwoo Kim